/Engine/Source/Runtime/MessagingCommon/Public/MessageEndpoint.h
Messages can only be forwarded to endpoints within the same process.
void Forward ( const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [IMessageContext](API\Runtime\Messaging\IMessageContext), ESPMode::ThreadSafe > & Context, const [TArray](API\Runtime\Core\Containers\TArray)< [FMessageAddress](API\Runtime\Messaging\FMessageAddress) > & Recipients, const [FTimespan](API\Runtime\Core\Misc\FTimespan) & Delay )